Tag Archives: Electronic C

Introduction This circuit enables you to connect both your washing machine and your tumble dryer on one wall outlet, without blowing the fuse! The trick is that the washing machine only consumes full power when heating the water. During the other stages (pumping, tumbling, centrifuging) the power consumption is much… Read more »

Three channel fan speed controller for PC Jos van Eijndhoven have designed a 3 channel fan motor controllerbased on PIC 16F676 microcontroller. Mcu reads temperature from sensors and outputs PWM modulated signal to each output so the speed of fan is controlled accordignly. Three on board potentiometers controls the start… Read more »

This circuit has proven useful when interfacing my computer to home made robotics. It is easy to build and use and it can control two DC motors of any current or voltage rating, depending on the rating of the relays. The circuit also provides two shaft encoders for positional feedback… Read more »

The ICL7136 is the IC of the CMOS that the function to measure the voltage of the input correctly, the function to control the LCD(Liquid Crystal Display) and so on are housed in 1 chip. It is possible to measure the voltage to Â±200 mV or Â±2 V. The ICL7136… Read more »

Circuit Touch Switch By IC CD4001, CD4020 This be touch switch be simple again the circuit. It use integrated digital circuit is important equipment, and use volt power supply low just 9V. By use single metal, it works in the character turn ON and turn OFF. By when touch for… Read more »

There are a few situations when a power failure is particularly difficult to handle. Some of these circumstances occur in the bathroom. This little circuit will pay for itself many times over the first time it is used, especially if you are in the shower. Read more original source: http://www.techlib.com/files/backup.pdf

From : http://ourworld.compuserve.com/homepages/Bill_Bowden/ Here’s a power-on time delay relay circuit that takes advantage of the emitter/base breakdown voltage of an ordinary bi-polar transistor. The reverse connected emitter/base junction of a 2N3904 transistor is used as an 8 volt zener diode which creates a higher turn-on voltage for the Darlington connected… Read more »

The circuit can be made automatic by adding a 1k resistor and diode: The oscillator will turn off when the output from the solar panel is above 1.3v and although the circuit does not shut down to zero current, it consumes about 3 mA, while the shut-off circuit takes about… Read more »

For regulating a solar panel’s output, there are several possible ways. A linear series regulator can be used, but has the disadvantage of causing some voltage drop and having some internal power consumption at times when the sun is weak and the load is heavy. It’s much better to use… Read more »

Solar panel regulators come in many flavors. The plainest flavor is the simple on-off type shunt regulator. It has the advantage of simplicity, extremely small power dissipation, low cost, high reliability, but in exchange for these advantages one has to accept that the voltage on the battery is always going… Read more »